Trump's health care agenda can succeed

Every president promises to fix health care -- but the system rarely seems to change for the better. Even when so-called reforms pass, prices remain unpredictable. Costs continue to rise.

If President Trump wants to succeed where others have failed, he'll need to target the gargantuan insurance companies that lie at the intersection of every other aspect of the healthcare system.

Insurers -- not patients and their doctors -- are the ones that ultimately determine what treatments and procedures patients can receive, which providers they can see, and what they ultimately pay.

While we often take...